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Lean Mass Builder Stack
Lean Mass Builder Stack

Lean Mass Builder Stack

Lean Mass Builder Stack

$340.00

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Unlock serious muscle-building potential with the Lean Mass Builder Stack. This powerful combo—Follistatin (1mg) Tesamorelin (10mg), and IGF-1 LR3 (1mg) —targets muscle growth, fat reduction, and cellular recovery. Follistatin suppresses myostatin, the key inhibitor of muscle growth, while Tesamorelin boosts GH and melts visceral fat. IGF-1 LR3 amplifies gains by increasing nutrient uptake and stimulating new muscle cells. For those chasing lean, dense mass without excess fat, this stack delivers next-level results.
Goal:

Unlock new levels of lean mass and muscle growth.

This Stack Includes:
  • Follistatin 344 | Blocks myostatin to unlock new muscle growth (2–3 week bursts).
  • Tesamorelin | Boosts GH, burns visceral fat, supports lean gains.
  • IGF-1 LR3 | Stimulates new muscle cells, enhances nutrient partitioning.

Product Description

Unlock New Muscle

Follistatin 344 temporarily blocks myostatin, the protein that limits muscle growth. This unleashes your body’s potential to grow new muscle tissue, making it one of the most powerful tools for anyone trying to break through a plateau. Results come fast—ideal for short cycles focused on gains.

Fat Loss Meets Muscle Gain

Tesamorelin boosts GH release, which supports muscle retention and burns deep visceral fat. The result? A leaner, more defined physique with improved recovery and performance. It’s a powerful body recomp tool that helps improve aesthetics and performance at the same time.

Our Vision

10+ Years of Peptide Expertise

At Pacific Peptides our mission is to offer you access to the highest quality peptides, helping you achieve the physique and fitness goals you’ve always dreamed of. Each of our peptides is designed to enhance overall well-being, boost performance, and promote vitality. With over ten years of experience in peptide formulation, Pacific Peptides offers a wide range of products to help you reach your full potential.

Anabolic Amplifier

IGF-1 LR3 works downstream of GH to stimulate muscle hyperplasia—literally creating new muscle cells. It also improves nutrient partitioning, meaning more of your food goes to muscle, not fat. When timed around workouts, it enhances growth and recovery in a way few peptides can match.

Elite Bodybuilding Stack

This stack is designed for serious lifters and physique athletes who want dense, high-quality mass gains. Each peptide works synergistically to build muscle, burn fat, and speed recovery. Whether you’re in a bulk phase or refining your frame, this protocol gets you there faster.

Side Effects

Usage Guidelines For Lean Mass Builder Stack

Follistatin 344 is best used in short cycles (2–3 weeks) due to its strong myostatin-blocking effects, which can rapidly increase lean muscle mass. Tesamorelin is injected daily, ideally in the evening, to stimulate natural growth hormone release and promote visceral fat loss. IGF-1 LR3 should be used post-workout to enhance nutrient partitioning and activate new muscle cell growth. Together, this stack fuels muscle hypertrophy, reduces stubborn body fat, and supports recovery. Use for 4–6 weeks with proper training and diet for best results. Always follow precise dosing and safety protocols.

Side Effects

Consult With a Healthcare Provider

Before considering the use of peptides, it’s important to speak with a licensed medical professional. They can assess your overall health, explain the potential benefits and risks, and provide tailored advice that fits your personal goals and medical history.

Choose Reputable, Quality Sources

To minimize the risk of contaminated or fake products, always source peptides from reputable vendors like Pacific Peptides. Stick to well-known suppliers who follow strict quality protocols and have earned a solid track record within the fitness or medical community.

Begin
Conservatively

When starting peptides, begin with the lowest dose that may offer results. Increase gradually only if necessary, paying close attention to how your body responds and watching for any unwanted effects along the way.

PRIORITISE RECOVERY & MONITORING

Peptide protocols should be supported by proper recovery and regular self monitoring. Prioritizing sleep, nutrition, hydration, and stress management helps maximize results while reducing the risk of unwanted effects. Allowing adequate time between cycles supports long term metabolic health and overall well being.

Explore our range of superior Stacks

Empower you to reach

Your Ultimate peak performance

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Side Effects + Considerations

Anabolic steroids present substantial health risks that necessitate careful consideration. Consult healthcare professionals before use to comprehend potential adverse effects, including cardiovascular issues, hormonal imbalances, and psychological impacts. Strictly adhere to prescribed dosages and durations while prioritizing regular health monitoring. Adolescents should refrain from using these substances due to potential growth interference. Opt for alternative fitness methods to prioritize overall health and well-being, and always use under professional supervision. The use of anabolic steroids demands thoughtful consideration due to serious health risks. Seek guidance from healthcare professionals before embarking on their use to fully understand potential adverse effects. Strictly adhere to prescribed dosages and durations, prioritize regular health monitoring, and avoid use by adolescents to prevent potential interference with growth. Explore alternative fitness methods that prioritize overall health and well-being, and use anabolic steroids only under the supervision of qualified professionals.

Side Effects + Considerations

Peptides should be approached with careful consideration, as they may carry potential health risks depending on the compound, dosage, and duration of use. It is strongly recommended to consult a qualified healthcare professional before use to fully understand possible side effects, interactions, and individual suitability. Adhering strictly to recommended dosages and protocols is essential, along with prioritizing regular health monitoring throughout any peptide regimen.

Peptides are not intended for use by adolescents, as they may interfere with natural growth and hormonal development. Individuals are encouraged to prioritise overall health and well being by maintaining proper nutrition, exercise, and recovery practices. Peptides should only be used responsibly and under appropriate professional guidance to minimise risk and support safe outcomes.